Yea, this is probably right. I think they still have until early next week to send invite and hold an event in October, but it is getting increasingly unlikely.There's not going to be an October event. It's the 17th now, if there was going to be an event, the press invites would have already been sent out by now.
Especially given how big some people seem to think this event will be. If all those rumors turn out true, this would be the largest Apple announcement this decade. Right now the rumors are new (1) iPad Pros; (2) Macbooks, and/or (3) Macbook Airs; (4) Mac Mini; (5) AirPower; (6) AirPods or AirPods charging case; and maybe (7) Mac Pro.
It is highly unlikely Apple will hold an event with one week notice, having almost no leaks, to announce such a wide range of products, ranging not just from consumer to pro, but also from accessory to primary. If even half of the rumors turn out true it would be pretty huge by recent Apple announcements standards.